Jomes



Sept. 30, 1930.

E. A; JONES GAS FURNACE Original Filed Aug; 24, 192'? 2 Sheets-Sheet 1INVEN TOR.

A ORNEYS.

E. A. JONES Sept. 30, 1930. A FURNACE Re. 17,817

Original Filed Aug. 24, 1927 2 Sheets-Sheet 2 ZA rr if t d g g Q] 1/ 2x4 12 M 23 \\\\\\\\\A/IIIll// I gp I.

[ llflljkfilglzgl M 1 N VEN TOR. 23 44 4. James.

A TTORNEYS.

Reissued Sept. 30, 1930 UNITED STATES PATENT OFFICE EDWIN A. JONES, OFMILWAUKEE, WISCONSIN, ASSIGNOR TO L. J. MUELLER FURNACE COMPANY, OFMILWAUKEE, WISCONSIN, A CORPORATION 01! WISCONSIN GAS FURNACE reissuefiled July 14, 1930.

This invention relates to improvements in gas furnaces.

It is one of the objects of the present invention to provide a gasfurnace in which the line passages are arranged with removable baflieswhich cause the gases to scrub all of the fluesurfaces to produce amaximum extraction of heat, the baffles also greatly reducing thevolumetric content of the fines, thereby decreasing the violence ofexplosion which might occur Within the furnace should collected gasesbecome ignited.

A further object of the invention is to provide a gas furnace in whichthe flue passages are readily accessible from the front of the furnacefor cleaning.

A further object of the invention is to provide a gas furnaceconstructed so as to have a long flue travel of a small volumetriccontent, and arranged so that the furnace may be built in half sections,the outer circumferences of which may be accurately ground to facilitatea gas tight assembly when said sections are bolted together.

A further object of the invention is to provide a gas furnace having aremovable front flue passage baflle to prevent the products ofcombustion from short circuiting through the front cleaning extension.

A further object of the invention is to provide a gas furnace which isof very simple construction. is efficient in operation. is strong anddurable, and is well adaptcd.for the purposes described.

lVith the above and other objects in view, the invention consists of theimproved gas furnace, and its parts and combinations, as set forth inthe claims, and all equivalents thereof.

In the accompanying drawings in which the same reference charactersindicate the same parts in all of the views:

Fig. l is a perspective view of a three unit gas furnace constructed inaccordance with the invention, parts being broken away to show detailsof construction;

Fig. 2 is an enlarged vertical sectional view through a unit indicatedon line 2-43 of Fig. 3;

Serial No. 215,124, filed August 24, 1927. Application for Serial No.467,987.

Fig. 3 is an enlarged cross sectional view of a unit indicated on line3-3 of Fig. 2;

Fig. 4 is a detail view of a furnace unit half section; and

Fig. 5 is a detail erspective view of one of the flue passage ba esused.

eferring now more articularly to the drawings, it will appear t at thegas furnace is designated generally by the numeral 8 and may be composedof any number of independent units 9 enclosed by a suitable casing 10,the furnace shown in Fig. 1 being composed of three units.

Each unit 9 is formed of a pair of complementary side wall members orsections 11, one of which is shown in detail in Fig. 4. The upperportions of said members 11 are provided with alternatin rows ofconcaved and convex portions 12 and 13, respectively, formingcorrugations, and the exteriors of said members are formed with fins orribs 14, so that a large surface will be afforded for the heating of airby convection. Due to the construction of the unit side sections 11 theadjacent surfaces of each pair may be accurately ground and when theyare assembled and bolted together, as shown in Figs. 2 and 3, a gastight connection is formed, the space heween said sections providin aflue. The rear ends of the fines are close except for an upper vent pipeconnection 15. The front portion of each unit has an upper opening 17and a lower 0 ening 18 extending through the frame 16. The lower opening18 is controlled by suitable removable plates to permit access to aburner 19 within the lower portion of the unit 9, while the upperopening 17 is normally closed by a door 20 controlling access to anupper forward flue cleaning extension 21, which cleaning extensiondirectly re isters with all portions of the fine and pre or ably extendsfrom immediately above the burner chamber to substantially the topportion of the flue. Within the flue cleaning extension and against thefront ends of the sections 11 a removable front bafilc 22 is positioned,said ballle being shown in the center unit of Fig. l, and also in Fig.3. The purpose of the baflle 22 is to prevent the products of combustionfrom short circuiting through the front cleaning extension 21 from theflue and the removability of the baffle permits ready accessibility tothe flue for cleaning.

By reference to Fig. 2, it will be seen that when the two sections 11 ofa unit, are connected, a vertically extending flue of serpentine shapeis formed therebetween, cooperating complementary corrugations of thesections forming courses, which courses in their vertical relationshipare staggered and are connected. It is desirable, however, that the flueopening be restricted or diminished as to volumetric content, and tothat end a plurality of horizontally extending internal flue baffles 23are provided. One of said baflies 23 is shown in detail in Fig. 5, andit will be seen to be triangular in cross section and is formed alongone edge with projecting lugs 23. Said baflles may be either cast assolid members, or as shells, and in practice it has been found desirableto form the same as shells. and fill the interiors with asbestos or thelike. It will be noted that the baffles 23 are not integral with theunit sections 11. but are inserted in the flue opening between opposedconcave and convex portions of the walls and are removably held inposition by the engagement of the lugs 23' with the fins 14, and also bylugs 24 cast on the inner surfaces of the sections 11 which engage theopposite sides of the baffles.

It will, therefore, be seen that the improved gas furnace is composed ofany number of units, and in each unit a serpentine like flue is providedabove the burners. By reference to Fig. 1 it will appear that each pairof adjacent units is separated by a thin, flat, vertical radiationshield. Said shields are positioned preferably equidistant betweenadjacent units and extend from an elevation in accord with the upperportions of the burner chambers to the upper portions of the units. Eachshield secures a greater heat emission per square foot of heatingsurface presented,

y increasing radiation from adjacent sections. increases heat emissionof adjacent sec tions by securing better scrubbing action of the aircolumns passing through the furnace, and also equalizes and causes aneven distribution of air passing through the units served by the shield.Due to the baffles 23. the space between the flue walls is greatlyrestricted, with the result that the gases will scrub the unit surfaces,insuring a maximum extraction of heat. The baflles also greatly reducethe volumetric content of the flues and thereby decrease the violence ofexplosions which might occur within the flucs from the collection andignition of unburned gases. Each unit has a long flue travel and becauseof the fact that the baflies are not integral with the unit sections.the units may be built in half sections and so formed that the entireouter surfaces may be accurately ground, whereby the sections may bebolted together around their outer circumferences and form a gas tightfit. Also, the accessibility of the flues from the furnace front forcleaning is of great advantage. The gas furnace is furthermore of simpleand novel construction, and is well adapted for the purposes described.

What I claim as my invention is:

1. A gas furnace, comprising a unit formed with a flue opening, and anindependent, removable baflle member mounted within said flue opening.

2. gas furnace, comprising a heating unit composed of a pair of securedtogether sections, a curved flue opening being formed therebetween, anda plurality of independent haflle members positioned between saidsections and restricting said flue opening.

3. A gas furnace, comprising a heating unit formed of a pair of securedtogether sections, a serpentine like vertically extending flue openingbeing formed therebetween, a burner positioned in the lower portion ofsaid unit and in register with the flue opening, and a plurality ofindependent, removable battle members positioned between said sectionsand restricting the volumetric content of said flue opening.

4. A gas furnace, comprising a heating unit formed of a pair of boltedtogether sections, a serpentine like vertically extending flue openingbeing formed therebetween, a burner positioned in the lower portion ofsaid unit and in register with the flue opening, and a plurality ofspaced, independent, horizontally extending removable baflle memberspositioned in staggered relation between said sections and restrictingthe volumetric content of said flue opening.

5. A gas furnace. comprising a heating unit formed of a pair of securedtogether sections. a curved flue opening being formed therebetween. saidheating unit having a cleaning opening in its front portion affordingaccess to said flue opening. a door for said cleaning opening. and aplurality of removable baflle members between said unit sections andrestricting the flue openmg.

6. A gas frame, comprising a heating unit formed of a pair of securedtogether sections, a curved flue opening being formed therebetween, afront cleaning extension formed on said unit registering with said flueopening and having a forward opening therein, a door for said forwardopening. and a plurality of removable baffle members be tween said unitsections and restricting the flue opening.

7. A gas furnace. comprising a heating unit formed of a pair of ribbedsections so cured together. a curved flue opening being formedtherebetwccn, a front cleaning cxtcnsion projecting from said flueopening and having a cleaning opening therein, a relllU movable bafl'lemember within said extension and engaging said section ribs, and aplurality of spaced removable baflle members between said unit sectionsand restricting the flue opening.

8. A gas furnace, comprising a heating unit formed of a pair of boltedtogether, ribbed sections, a serpentine like vertically extending flueopening being formed therebetween, a front cleaning extension formed insaid unit and registering with said flue opening, said extension havingan opening, a door for said 0 member within said extension adjacent saidsection ribs, a burner within the lower portion'of said unit and inregister with the flue opening, and a plurality of spaced, inde pendent,horizontally extending, removable, triangular battle members positionedin staggered relation between said sections and re stricting thevolumetric content of said flue opening.

9. A gas furnace, comprising a heating unit formed of a pair of boltedtogether,

' ribbed sections, a serpentine like vertically extending flue openingbeing formed thercbetween, a front cleaning extension formed in saidunit and registering with said flue opening, and a door for saidopening.

10. A gas furnace, comprising a heating unit having a curved flue oening, and a plurality of independent and spaced baflle members withinsaid flue opening and restricting the same.

11. A gas furnace, comprising a heating unit formed of a pair of boltedtogether sections, :1 serpentine like vertically extending flue openingbeing formed therebetween, a front cleaning extension formed in saidunit and registering with said flue opening throughout substantially theentire height of the same, and a door for said opening.

12. A gas furnace, comprising a heating unit formed of a pair ofcomplementary, secured together sections, a vertically extending, curvedflue opening being formed therebetween, said sections also forming alateral cleaning extension in registration with said flue'opening andaffording direct access to any portion of said curved flue opening, anda door for said extension.

13. A gas furnace, comprising a unit formed of a air of complementary,secured together sections, a combustion chamber being formed between thelower portions of said sections, and a vertically extending flue openingof compound curvature being formed between said sections above thecombustion chamber, said unit also being formed with an enclosureforwardly of the flue opening registering with the same and affordingdirect access to the flue opening throughout substantially its entireheight for cleaning purposes, and a door for said enclosure.

14. In a heating apparatus, a unit formed ning, a removable bafile' of apair of complementary sections secured together in enclosure forminrelation to rovide in said unit a lower com ustion chamr, a verticallyextending serpentine-like flue thereabove, and a hollow extension abovesaid combustion chamber and projecting slightly outwardly of the finethroughout substantially its entire height and in registration with thesame for access for cleaning, each section being formed with a lower,semi-combustion chamber forming portion, a corrugated semi-flue formingthereabove, and a slightly forwardly extending semi-cleaning extensionforming portion extending lengthwise of the section substantially thevertical distance of the flue forming portion, each section beinggenerally of U-formation in transverse and longitudinal sections.

15. A gas furnace, comprising a heating unit formed of a pair of boltedtogelher corrugated se tions, which in secured together relation havetheir respective corrugations in staggered relation and laterallyoifset, a serpentine-like flue opening being formed between saidsections and each complementary pair of corrugations forming a course,the adjacent ends of which courses communicate to provide aserpentine-like vertically extend ing passage, the courses in theirvertical rela tionship bein staggered, a front cleaning extension formedin said unit and directly registering with at least two of said courses,and a door for said extension.

16. In a heating apparatus, in combination, a pair of spaced-apartheating units, each unit being formed of a pair of corrugated sections,a serpentine-like vertically extending flue opening being formedtherebetween, and a clean-out extension being formed for wardly of saidflue opening and in registration with the same throughout substantiallyits entire height, a casing enclosing said heating units, and aradiation shield interposed within said casing between the units.

17. In a heating apparatus, in combination. a pair of spaced-apartheating units, each unit being formed of a pair of corrugated sections,a serpentine-like vertically extending flue opening being formedtherebetween, and a clean-out extension being formed forwardly of saidflue opening and in registration with the same throughout substantiallyits entire height, a casing enclosing said heating units, and a thin,flat surfaced, radiation shield interposed Within said casingvertically, substantially equidistant between said units.

18. In a heating apparatus, in combination, a pair of s aced-apartheating units, each unit being ormed of a pair of corrugated,complementary sections, a combustion chamber being formed between lowerportions of said sections, and a scrpentine-like, vertically extendingflue opening being formed between said sections above the combustionchamber,

each unit also being formed with an enclosure forwardly of the flueopening registering with the same, a casing enclosing said heatingunits, and a flat surfaced radiation shield within said casing andpositioned vertically, substantially equidistant between said units andextending from the upper portions of the combustion chambers to the topportion of the fines.

19. In a heating apparatus, in combination, a pair of spaced-apartheating units, each unit being formed of a pair of corrugated.complementary sections, a combustion chamher being formed between lowerportions of said sections, and a serpentine-like, vertically extendingflue opening being formed between said sections above the combustionchamber, each unit also being formed with an enclosure forwardly of thefine opening registering with the same and having an exterior opening, acasing enclosing said units with the exterior openings of saidenclosures being accessible from the exterior of the casing, doors forsaid openings of the enclosures, and a flat surfaced radiation shieldwithin said casing and positioned vertically, substantially equidistantbetween said units and extending from the upper portions of thecombustion chamber to the top portions of the fines.

In testimony whereof, I afiix my signature.

EDWINtA. JONES.

DISCLAIMER Re. 17,817.Edwin A. Jones, Milwaukee, Wis. GAs FURNACE.Patent dated September 30, 1930. Disclaimer filed June 16, 1933, by theassignee, L. J. Mueller Furnace Company.

Hereby enters this disclaimer to that part of the claims in saidspecification which are in the following words, to Wit:

9. A gas furnace, comprising a heating unit formed of a pair of boltedto ether, ribbed sections, a serpentine like vertically extending flueopening being orrned therebetween, a front cleaning extension formed insaid unit and registering with said flue opening, and a door for saidopening.

11. A gas furnace, comprising a heating unit formed of a pair of boltedtogether sections, a serpentine like vertically extending flue openingbeing formed therebetween, a front cleaning extension formed in saidunit and registering with said flue opening throughout substantially theentire height of the same, and a door for said opening.

12. A gas furnace, comprising a heating unit formed of a pair ofcomplementary, secured together sections, a vertically extending, curvedflue opening being formed therebetween, said sections also forming alateral cleaning extension in registration with said flue opening andaffording direct access to any portion of said curved flue opening, anda door for said extension.

13. A gas furnace, comprising a unit formed of a pair of complementary,secured together sections, a combustion chamber bein formed between thelower portions of said sections, and a vertically extending ue openingof compound curvature being formed between said sections above thecombustion chamber, said unit also being formed with an enclosureforwardly of the flue openin registering with the same and affordingdirect access to the flue openin throug out substantially its entireheight for cleaning purposes, and a door for said enclosure.

14. In a heating apparatus, a unit formed of a pair of complementarysections secured together in enclosure forming relation to provide insaid unit a lower combustion chamber, a vertically extendingserpentine-like flue thereabove, and a hollow extension above saidcombustion chamber and projecting slightly outwardly of the fluethroughout substantially its entire height and in registration with thesame for access for cleaning, each section being formed with a lower,semi-combustion chamber formin portion, a corrugated semi-flue formingportion thereabove, and a sli htly forwardly extending semi-cleaningextension forming portion extending lengthwise of the sectionsubstantially the vertical distance of the flue forming portion, eachsection being generally of U-formation in transverse and lon 'tudinalsections.

15. A gas furnace, comprising a heating unit formed 0 a pair of boltedtogether corrugated sections which in secured together relation havetheir respective corruations in staggered relation and laterally offset,a serpentine-like flue opening being ormed between said sections andeach complementary pair of corrugations forming a course, the adjacentends of which courses communicate to provi e a serpentinelike verticallyextending passage, the courses in their vertical relationship beingstaggered, a front cleaning extension formed in said unit and directlyregistering with at least two of said courses, and a door for saidextension.

[Oficial Gazette July 11, 1.933.]

